5D MkII initial thoughts.

Oh where do I start? I think a list in no particular order will have
to suffice.

This was a preprodution camera, any findings listed here may not be
acurate for shipping units.

1./ There is no way you can hold this camera steady whilst shooting video. Some kind of support is a must.
2./ Accurate focusing for video is easy before you shoot using a 10x zoom on the rear screen.
3./ Accurate focus whilst you shoot video is very difficult despite the awesomely sharp screen. The art of the focus puller is not lost.
4./ The HDMI port outputs a lower resolution whilst filming. Full res only on playback. Don't know what happens when viewing but not actually recording. I didn't get to test the hdmi at all.
5./ AF works during record but the AF on button causes the image to
brighten whilst the af works and this is recorded in the footage.
6./ Video became choppy when a lensbaby was used instead of a canon lens. Shame. Hope this is a firmware issue. Didn't have time to test if this was caused by a setting.
7./ Everything about this camera in low light is amazing. Stills and video. Just nuts.
8./ During video, ISO is used for auto exposure, like auto gain control I suppose.
9./ Nice grid option on live view.
10./ Peripheral brightness correction (vignette removal) works nicely in stills and video.
11./ Flash triggering of all kinds is disabled during video.
12./ To put 11 in context, whilst shooting video you can fire a full res still. Video is paused and a (roughly) half second key frame of the still is inserted, video then resumes. You are left with one video file and one image file.

More later as I absorb things and go over the footage and stills.

Unfortunately I can't publish the results or files publicly.